Assistance Needed: Figma Project Crash and Error Message

Hi, I am a new user. I created a relume project, successfully loaded to Figma and the site crashed. I did a hard refresh of the page and then logged out and back in. Prior to this, I chose an option to save as a html on my desktop (wrong?). I’m now getting an error msg: a history state object with URL____ cannot be created in a doc with origin “null.” Looking for your kind support.:)